Hi Markus !
Your 3 intended signals were abt 30dB above noise, 1st sidebands at
471.8 and 475.8 were 10dB down, additional lines at 470.8 and 476.8 were
20 dB down from main signal, but still 10dB above noise here in JO53gv.
No QSB visible at any line, sorri. Would be an interesting test. I will
have a look at my SDR-recordings later.
73 de dg3lv Tobias
Am 17.02.2014 23:50, schrieb Markus Vester:
Tobias,
many thanks for the report! Yes I expected those outer lines, but not
that someone would actually hear them... guess I will have to modify
the frequency scheme for future tests.
Did you happen to observe whether the three channels were affected by
different QSB patterns? On the Heidelberg grabber, they were clearly
different: whenever one frequency suffered a deep fade, at least one of
the others was going strong. But for larger distances and lower skywave
angles the delay spread will presumably be smaller, and 1 kHz
spacing may no longer be effective enough.
Back to "pure" single carrier mode now...
Best 73,
Markus (DF6NM)
*From:* Tobias DG3LV <mailto:[email protected]>
*Sent:* Monday, February 17, 2014 11:20 PM
*To:* Markus Vester <mailto:[email protected]>
*Subject:* Re: LF: DF6NM beacon..
Hi Markus !
Confirming, Three lines and two more lines, weaker(-10dB), at 475.8 and
471.8 kHz.
73 de dg3lv Tobias
Am 17.02.2014 23:01, schrieb Markus Vester:
> Dave, many thanks for the report!
> I'm currently testing frequency diversity as a possible anti-QSB
> measure, simultaneously transmitting on 472.8, 473.8 and 474.8. I'm also
> listening on these three QRGs.
> Will look for QSO activity in a few minutes.
> Best 73,
> Markus (DF6NM)
>
> *From:* Dave G3WCB. <mailto:[email protected]>
> *Sent:* Monday, February 17, 2014 10:51 PM
> *To:* [email protected]
<mailto:[email protected]> <mailto:[email protected]>
> *Subject:* LF: DF6NM beacon..
>
> Hi, Markus.
>
> I'm copying your CW beacon on 472.8 RST 539. Your signals are very
> steady with hardly any QSB.
> I don't think I've heard you on CW before. RX antenna is a tuned
> 80cm square loop with a pre-amp.
> TEST ON 472R8 KHZ ......VVV TEST DE DF6NM....etc
> 73, Dave G3WCB IO91RM, nr Windsor under Thames.
>
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